and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.

因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。

In the organization of industrial life the influence of the factory upon the physiological and mental state of the workers has been completely neglected.

在工业生活的组织中，工厂对工人的生理和精神状态的影响完全被忽视了。

It can be unpleasant to live even several miles from an aerodrome;

即使住在离机场几英里以外的地方，机场的噪音也会使人难受。

of the nature of the illness from which his friend was suffering,

不知道他的朋友得的是什么病，

But can we blame those who looked and failed to see what Galileo saw, if we remember that to use a telescope at the limit of its powers calls for long experience and intimate familiarity with one's instrument?

但是，如果我们想到，便用一架倍数有限的望远镜需要长期的经验和对自己仪器的熟悉程度，那么我们怎么能去责备观察了天空但没有看到伽利略所看到的东西的那些人呢？

which we may call respectively the tough and the gentle.

我们分别称之为强硬法和温柔法。